Governor for internal-combustion engines.



PATENTED DEG. 18, 19061 E. E. SMITH. GOVERNOR EoR INTERN ALYGOMBUSTION ENGINES.

a Mim APPLICATION FILED "MAY 12. 1905.

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FREDERICK HUGH SMITH, OF DATCHET, ENGLAND.

GOVERNOR FoR INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent.

Patented Dec. 18, 1906.

Application filed May 12, 1905. Serial No. 260,122.

' 1'0 all /1/0721 it TILLLZJ concern:

Be it known thatl, FREDERICK HUGH SMITH, asubject of the King of Great Britand Ireland, residing at Home l/Vorks, Datchet, in the county of Buckinghani,England, have invented certain new and useful improvements in and Relating to Governors for internal-Combustion Engines, of which.

in which a valve is operated by the engine suction.

Now the object of the present invention is v to provide simple and compact means for controlling the valve by hand or other suitable means without interfering with its automatic action.

The present invention consists in a governor of this type in which the valve is directly operated by the engine suction against the action of a spring and is supported in a movable carriage, so that it may be moved with its controlling-spring nearer to or farther away from its closing position without altering the tension of said spring.

Referring now to the accompanying drawings, which form part of my specification, Figure 1 is a vertical section through the engine induction-pipe, showing the arrangement of my governor within that pipe. Fig. 2 is a vertical section at right angles to the section shown in Fig. 1.

In carrying the invention into effect according to one form, as illustrated in the accompanying drawings, a spring-controlled puppet-valve a is placed in induction-pipe b. The valve a is guided by its central rod 0, leading to the engine-cylinder w, in a carriage d, to which are fixed arms 6 and These arms extend through sloping slots 9 and h in the walls of the induction pipe, and also through vertical slots and 7c in a sleeve m, adapted to work outside the induction-pipe b and under the control of a hand-levern. The carrying-block d is provided with a collar 19, against which, on its under side, there bears the spring 0, while on the top side the spring 1' rests. The spring 0 also bears on the valve a, which is preferably dished, as shown, while 1 the spring?" bears on a loose collar or washer s on the head of .the guide-spindle c, this loose collar being adjusted by means of nuts t.

The action of this device is as follows: Under ordinary circumstances the springs 0 and 'r. coact to hold the valve a open the desired amount, this amount being determined by the hand controlling-lever 'n. Thus if the slanting slots 9 and h are right-handed, as shown in Fig. 1, by rotating the lever n in a clockwise direction the maximum amount of opening is obtained. Similarly by moving the lever in a counter-clockwise direction the block (1 is carried upward and the amount of opening of the valve a is reduced. This relates to the hand control.

The automaticgoverning action is as follows: Assume that the lever n has placed the valve in its mean position. When the charge is being sucked into the engine-cylinder through the pipe 1c in the direction shown by the arrow :20, the valve a is drawn toward its seating. Under normal working the springs 0 and 1 maintain the valve a open in spite of this suction. When the engine speed increases, the suction increases, and consequently the valve (1 throttles the charge. The valve (1 does not, however, operate till the enginepiston has very nearly reached its midposition,when, as is well understood, its speed is maximum, and consequently the suction is greatest. The balancing of the spring 0 and 1" is such that when the engine speed goes above certain limits the valve 0 closes. Further, it will be seen that when valve (1 has once closed it will remain closed during the remainder of the charging stroke, because of the increased suction due to the continued outward motion of the engine-piston. In this way the governing is rendered very sensitive, because whenever the valve a commences to throttle it will invariablyclose completely, since as the valve (1 approaches toward its seating the suction force on the valve (1 is increased by the combined action of the throttled suction-passage and the increased engine speed.

Other forms of valve may be used for throttling the chargeas, for instance, a piston-valve having ports. The form described,

however, is that which in practice I prefer to employ, because of its cheapness and easy manufacture, and also because it provides a very e'l'licient governor of the induction type. It will be seen that with this invention the engine may be conveniently controlled automatically and by hand with the same valve. Having thus described my invention, what I claim as new, and desire toseoure by Letbustion engine, a governor of the induction ters Patent, is

1. A governor for, internal-combustion motors having in combination on the engine induction-pipe, a spring-controlled valve ar-v ranged to open and close in the direction of the engine suction, and means connected with the valve for. moving the valve in that 7 direction by hand without altering the tension of the spring, substantially as described.

2. A governor of the induction type for internal-combustion engines, having in combination aspring-controlled valve interposed in the path of the fluid flowing into the engine- "cylinder, a valve-stem acarriaged/ engaging said valve-steinand supporting saidspringcontrolled valve, andiineans connected with the-carriage for moving the carriage with i the-valveand spring in the direction of open ingand closing of said valve without altering v ternal-combustion engines, having .in combithetensionof thespring substantially as described.

A governor of theindnction type for in- I nation a dished valve a,r-a valve stem, springs 0 and 1' controlling said valve; a carriage engaging said valve-stem and supporting said valveand springs and means connected with the carriage for moving said ioarriage with the valve and spring in the direction of 0 ening and closing of said valve, substantial y as described.

fl. Incombination an internal-com- 5. In combination with an internal-c0mbustion engine, a-governor of the induction type comprising a valve wlocated in the engine suction-pipe; controlling-springs 0 and 1"; a carriage d; iiTIIlSB-tfidextending from said carriage ;-slots g and informed in the walls of the engine suction-pipeandadapted to guide the arms e and); a sleevemsurrounding the engine induction-pipe and receiving the'ends of the armse'and a lever n for r0- tating said sleeve, substantially as described In-testimony whereof I have signed my nameto this specificationin the presence of two subscribing witnesses.

F EDE I K. HU H.. H

l Vitnesses -GEORGE GoBB,

JAMES GARDNER. 

